Insulator



- May 8, .1923. 4,454,634 1 w. T. GODDARD iNsULAToR Filed Jan. 25 1919 2 Sheets-Sheet l INVENTOR Waki r Tbeizard ATTORNEYS May 8, 1923. 1,454,634

W. T. GODDARD INSULATOR Filed Jan. 25 1919 2 Sheets-Shoot 2 Mizzesseak INVENTOR WzZie 2 M;

Patented May 8, 1923.

UNITED STATES PATENT OFFICE.

WALTER T. GODDARD, OF HAMILTON, ONTARIO, CANADA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO LOCKE INSULATOR CORPORATION, OF BALTIMORE, MARY- LAND, A CORPORATION OF MARYLAND.

INSULATOR.

Application filed January 25, 1919.

To all whom it may concern.-

Be it known that I, WALTER T. GODDARD, a citizen of the United States, residing at Hamilton, in the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Insulators; and I do hereby declare the following to be a full, clear, and exact description of th same, reference being had to the acco1npanying drawings, forming a part of this specification, and to the 1 reference numerals marked thereon.

My present invention relates to electrical insulators and more particularly to high tension porcelain insulators that are required to withstand great tensile strains and it has for its object to provide a means whereby such insulators may be connected together or connected to other elements by which they are supported or which they in turn support in a manner that will distribute the strain uniformly through the frangible mass of the insulator to the end that it may offer maximum resistance to fracture. To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure 1 is a fragmentary top plan view of an insulating unit constructed in accordance with and illustrating one embodiment of my invention;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a fragmentary section through the insulating element alone taken on the line 3-3 of Figure 2;

Figure 4 is a. fragmentary side elevation;

Figure 5 is a side elevation of an insulator of another type, embodying my invention;

Figure 6 is a vertical section through the base thereof, and

Fig. 7 is a section on the line 7-7 of Figure 6.

Similar reference numerals throughout the several views indicate the same parts.

Referring first to the embodiment of the invention shown in Figures 1 to 4, there is there illustrated one unit of a suspension type insulator comprising an insulating element 1 of porcelain or similar material and suspension caps 2 and 3 from the former of Serial No. 273,145.

which the insulator is supported and the latter of which is supported by the insulator, the caps being provided with ears or lugs 4 apertured at 5 to receive bolts by means of which a number of units may be connected together in the ordinary manner. The contiguous portions of the insulator 1 comprise annular lugs 6 and 7 at the top and bottom of the latter and the disc-shaped caps bear against the ends or fiat surfaces of these, being preferably embossed, as shown, to center them with respect to the annular conformation. The lugs 6 are pierced by a plurality of apertures uniformly distributed through the mass of the material to which end I prefer to provide two series or tiers 8 and 9 located one above the other on dif ferent circumferences to bring the apertures in staggered relationship. A ring of apertures 10 on corresponding radii are provided in the caps 2 and 3 and the caps are tied to the insulator by a preferably continuous flexible member 11 that is laced back and forth in the manner shown, with its ends tied together by a suitable clamp indicated at 11 in Figure 1. The result of this construction is that the strain communicated to the insulator at the point of attachment is distributed evenly through the mass of the attaching portion, whereas with methods heretofore employed, the strain has always been localized. more or less, with the result that all of the particles of the mass did not exert their cohesive effort simultaneously. Aside from the points of strain being distributed through the location of the apertures, the proportion of strain assigned to each point is also made uniform because of the nature of the lacing 11 which develops enough slippage or creep to equalize the tension and prevent any one loop of the lace from bearing more than its share. The smooth and glassy finish common in these insulators permits this freedom of adjustment on the part of the tie member.

In Figures 5, 6 and 7 I have shown my improvement embodied in a. pin type insu lator, namely, one that is supported from below and bears the weight of the cable. The insulator proper is indicated at 12 in these figures and the cable seat at 13 while 14 is a somewhat flaring annular base. The apertures 15 are formed in this base and come'opposite corresponding apertures 16 in a table 17 that is held to a cross arm or other support by a pin 19. The base 14 of the insulator rests upon a. seat 20 provided on the table and the lacing 21 passing through the apertures 15 and 16 and secured by a clamp 22 at its ends holds the elements together as before. Thus, any tendency on the part of the insulator to tip under the weight of the supported cable or other laterally directed forces is resisted by the even distribution of the strain on the part of the lace 21. i

I claim as my invention:

1. An insulator unit comprising a frangible element and a metallic element each having a plurality of independent apertures, and means for connecting said elements, said means comprising a continuous flexible lacing passing alternately through the said apertures of said elements to commie nicate strains from one of said elements to the other.

2. Aninsulator unit comprising a frangible element having uniformly distributed apertures therein and a metallic element, and means for supporting one of said elements from the other, said means comprising acontinuous flexible member passing through the apertures in the frangible element.

3. An insulator unit comprising a frangible element having an annular portion provided with uniformly distributed apertures extending therethrough and a metallic element, means for supporting one of said elements from the other, said means comprising a flexible element laced through the apertures in the frangible element to tie the elements together.

4. An insulator composed of frangible material having a plurality of apertures uniformly distributed through its mass, and a contiguous element also provided with a plurality of uniformly distributed apertures, and means including a flexible element adapted to be laced through the adjacent apertures of the two first mentioned elements for connecting the same.

5. An insulating unit comprising a frangible element, a rigid metallic element, and a continuous flexible lacing for connecting said elements, said lacing having a plurality of loops each embracing an individual portion of said frangible element and also having a plurality of loops each embracing an individual portion of said connected element.

6. An insulating unit comprising a frangible element, a rigid metallic element, and a continuous flexible lacing passing back and forth between said elements and engaging each of them at a succession of points.

7. An insulating unit comprising an ele ment formed of frangible insulating material. a rigid metallic element connected thereto. and means for connecting said elements at a plurality of points and for equalizing the strains imparted from one of said elements to the other, said means involving a continuous flexible sinuous member alternately engaging the said connected elements at a sucression of points on each of said elements. I

8. An insulating unit comprising an element formed of. frangible insulating material, a rigid metallic element connected thereto, and a continuous flexible member connecting said elements and adapted to transfer strains from one of them to a plurality of spaced points upon the other.

WALTER T. GODDARD. 

